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fzus63 kmqt 172009
glfls 
883 

open lake forecast for lake superior
national weather service marquette mi
409 pm edt thu aug 17 2017

for waters beyond five nautical miles of shore on lake superior

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...low pressure of 29.5 inches over northwest wisconsin 
will cross the upper great lakes tonight and reach southwest quebec 
friday night. in its wake, high pressure of 30.0 inches will shift 
east to the western great lakes late friday and then expand over the 
great lakes region saturday into sunday. on sunday afternoon a
29.9 inch trough moves into western lake superior and then tracks
east through sunday night. a 30.1 inch high pressure ridge 
follows on monday. a 29.8 inch low moves across the upper great 
lakes on tuesday. 

lsz162-180415-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
409 pm edt thu aug 17 2017 /309 pm cdt thu aug 17 2017/

.late this afternoon...north winds 15 to 25 knots. patchy fog.
scattered showers and isolated thunderstorms. waves 3 to 5 feet
occasionally to 7 feet. 
.tonight...north winds 15 to 25 knots backing northwest after
midnight. patchy fog through midnight. a slight chance of showers
through midnight. waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet. 
.friday...northwest winds 10 to 20 knots backing west in the
afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots. a chance of showers
through midnight. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...southwest winds 10 to 20 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.monday...east winds 5 to 15 knots backing northwest. a chance of
showers. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots becoming northwest 10 to
20 knots. waves calm to 2 feet. 

$$
fzus63 kmqt 172009
glfls 

lsz263-180415-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
409 pm edt thu aug 17 2017

.late this afternoon...northeast winds 15 to 25 knots. patchy
fog. scattered showers and thunderstorms. waves 4 to 8 feet
occasionally to 10 feet. 
.tonight...north winds 15 to 25 knots backing northwest late.
patchy fog. a slight chance of thunderstorms through midnight. a
chance of showers. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.friday...northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.friday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet. 
.saturday night...southwest winds 5 to 15 knots. waves 1 to
3 feet. 
.sunday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots. a chance of
thunderstorms through midnight. a chance of showers. waves calm
to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$

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